Air conditioner



FIG. 1 is a front elevation view of an air conditioner, in accordance with the invention;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a right side elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a front elevation view of the air conditioner in a shutoff state.

The broken lines in the drawings illustrate portions of the air conditioner, which form no part of the claimed design. 

CLAIM The ornamental design for an air conditioner, as shown and described. 